45 degree-line in Stata graphing

[Zuhumnan Dapel]

Dear All,
Is it possible to fit (not manually using the graphic utilities) 45⁰ line in Stata after drawing, e.g. two-way scatter plot? If yes. How? I'm just after accuracy. Thanks,
Dapel

[Nick Cox]

I presume you mean the line of equality y = x. If so, yes. Consider this dopey example and also read the help file flagged.

 
sysuse census
scatter divorce marriage marriage, c(. l) ms(Oh none) sort



help twoway function

[Zuhumnan Dapel]

I'm there. Thanks a million

[Santiago Cantillo]

Hi, is there anyway to draw the 45 degree line on a non-twoway graph? I'm trying to do this using binscatter (community-contributed). Thanks!

[Nick Cox]

binscatter is from SSC, as you are asked to explain. I can't see from a quick look at the help and the code that this is allowed, but ask the author directly if he doesn't reply.

[Ali Atia]

Try something along the lines of:

binscatter yvar xvar xvar, line(none) ms(Oh none) leg(off)
graph addplot line xvar xvar

[Santiago Cantillo]

Try something along the lines of:

binscatter yvar xvar xvar, line(none) ms(Oh none) leg(off)
graph addplot line xvar xvar

Works nicely, thanks! Just need to figure out how to include a place in the legend for "y=x".

[Ali Atia]

Add - leg(holes(1 2) order(3 "y=x"))- as an option to the graph addplot. Also, this only works if the default scale for the xvar is greater than the default scale for the yvar. I'm glad it seems to work for you now, but in other cases you may need to manually adjust scales.